Milking-machine teat-cup.



NI. LIITCH.

, Mluuwe MAcHsNE TEM cuP.

v APPLICATION FILED OCT. 15V. |9161 192.39993-3, Patented Sept. 11, 1917.

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MEREDITH LEITCH, oF POUGHKEEPSIE, NW YoRK, AssIGNoB. To THE DE LAVAL sEPAnAToR COMPANY, A CORPORATION or NEW JERSEY.

MILKING-IVIACHINE TEAT-CUP.

lSpecification of Letters Patent. y

Patenten sept. ai, rait.

Application led October 16, 1916. Serial N o. 125,833. I

- To all whom t may concern:

Poughkeepsie, county of Dutchess, and State' of New York, have invented a new and useful Improvement in Milking-Machine Teat- Cups, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to milking machine teat cups of the class having a central teat receiving chamber and an annular pulsation chamber. The object of my invention is to provide a teat cup that is sanitary and is easily assembled.

The accompanying drawing shows a longitudinal section of a teat cup embodying my invention in its preferred form.

The rigid, or comparatively rigid, shell a is preferably made of hard rubber or celluloid. The liner b forms a flexible partition between the inner teat chamber 0 and the outer annular pulsation chamber d. The uppfer part of the liner is stretched around a ring e and forms a mouth f to surround v,

the base of the teat. The lower end of the liner is turned back around the lower end 0f the shell and -is secured in place byy forcing over and around it a soft rubber cap g.

The upperpart of .this cap is shaped to t over a beadI la. on the cup shell a. The l'ower end of the shell a is preferably of smaller diameter than the remainder of the shell. Through the shouldered portion of the shell connecting its narrower and wider portions are several holes i which provide communication between the pulsation chamber d and a small annular chamber j around the lower part of thel shell inside the cap g. The chamber j, it will be observed, is formed when the cap g is applied to the shell a as described. Formed in one piece with the cap g is a milk tubelc and also a pulsation tube Z. When the cap g is applied to the shell a and the liner b, the milk tube 7'; communicates with the milk chamber c and the .pulsation tube Z communicates with the pulsation chambers j and d. When in usethe milk tube 7c is connecte to a source of suction, .generally a partial vacuum of about 15 :inches of mercury, and the pulsation tube is connected to a source of pneumatic pulsations, generally produced by connecting the tube alternately to the source of suction and to the atmosphere.

I am aware that teat cups havebeen made with rigid shells having a pulsation nipple attached thereto and lhaving screw collars for clamping a metallic cap against the liner to hold the lower end thereof, but such cups are necessarily slower to assemble and disassemble; hence there, is a tendency to neglect thorough cleaning.

The shell of my cup, having no threads, is

vparticularly adapted for manufacture from lhard rubber, Celluloid or similar non-corrodible material, so that the entire cup may be placed in a germicidal solution for an'indefinite time without injury. l

Having now fully described my invention, what I desire to claim and protect by Letters Patent is:

1. In a milking machine teat cup, the combination with a rigid shell and a flexible liner engaging the shell at both ends, of a flexible cap and a milk tube formed integral therewith, said cap retaining the lower end of the liner in position on the shell.

2. In a milking machine teat cup, the combination with a rigid shell and a flexible linerengaging the shell at both ends, of a flexible cap and a pulsation tube formed integral therewith, said cap retaining the lplwr end of the liner in position on the s e 3. In a milking machine teat cup, theI combination with a rigidshell and a flexible liner engagingthe shell at both ends, of a Hexible cap and a milk tube and pulsation tube formed integral therewith, said cap between its tubes engaging the liner and'holding it in position on the shell.

municating withthe lower end of the cap,

and a pulsation tube openinginto the sid'e wall of the cap, of a rigid shell, and a flexible liner engaging the shell, said cap at its upper end surrounding the shell and toward its lower end conning the liner to the shell at a point between the caps milk tube opening and its pulsation tube opening, the shell being perforated to afford communication between the annular chamberformed be-4 tween the'liner and the shell and -the annular chamber formed between the shell and the cap.

6. In a milking machine teat cup, the combination with a rigid shell having a large diameter for the upper major portion of its length, a small diameter for a lower minor portion of its length, and a bead around the larger diameter portion adjacent to the reduction in diameter, there being holes through the wall connecting the larger diameter portion with the small diameter portion, and a flexible liner turned upward around the small diameter portion, of a flexible elastic cap adapted to fit tightly around the upwardly turned liner and be selcurd in place by fitting tightly over the 7. In a milking machine teat cup, thc combination with a rigid shell having a contracted lower end and a flexible liner within the shell and engaging its lower end 'of means forming a pulsation chamber outside the lower contracted part oftheshell, a milk ytube communicating with the interior of the liner, and a pulsation tube communicating with the pulsation chamber, the shell being perforated to afford communication between the pulsation chamber and the annular chamber between the shell and the liner.

8. A device for attachment to .the lower Iend 0f a teat cup, comprising a cap having an open top, a milk tube communicating with the base of the cap and a pulsation tube opening into the side wall of the cap.

In testimony of' which invention, I vhave hereunto set my hand, at Poughkeepsie, on

this 12th day of October, 1916.

MER-EDITH LEITCH. 

